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6055870 
Journal Article 
The 8.2 ka event from Greenland ice cores 
Thomas, ER; Wolff, EW; Mulvaney, R; Steffensen, JP; Johnsen, SJ; Arrowsmith, C; White, JWC; Vaughn, B; Popp, T 
2007 
1 
Quaternary Science Reviews
ISSN: 0277-3791 
26 
1-2 
70-81 
WOS:000244024800005 
We present a collection of high-resolution chemistry and stable isotope records from the plateau of the Greenland ice cap during the cold event 8200yr ago. Using a composite of four records, the cold event is observed as a 160.5yr period during which decadal-mean isotopic values were below average, within which there is a central event of 69yr during which values were consistently more than one standard deviation below the average for the preceding period. Four cores in north, south, and central Greenland show differences at decadal and shorter timescales; it is not yet clear if this represents significant spatial differences in response. The results show clear evidence for colder temperatures and a decrease in snow-accumulation rate. However, the changes in chemical concentrations for the ions looked at here are small, suggesting only minor changes in atmospheric circulation for this event. Apart from the decrease in methane concentration, Greenland ice cores give only weak evidence for effects outside the North Atlantic region.